15t^2+7t=2

3 answers

The quadratic formula tells you that the solutions are:
t = [-b +/-sqrt(b^2 - 4ac]/(2a)

In this case, a = 15, b = 7 and c = -2

See what you get.
In google type:
quadratic equation online

When you see list of results click on:
Free Online Quadratic Equation Solver:Solve by Quadratic Formula

When page be open in rectangle type:
15t^2+7t=2
and click option: solve it

You will see solution step-by step
thank you the site is very helpful.